I'm guessing b but I'm not sure
The Answers C
Probably not D, because its probably not that urgent as this machine can cause severe unconsciousness, or even death.
Maybe not A because it may not be there for the person for its too big, and it usually used in hospitals. Basically, its not portable.
Not B Either.
Answer:
Oxygen bleach is hydrogen peroxide with sodium and sometimes sodium carbonate (washing soda) added. Oxygen bleach is a gentler and less toxic alternative to chlorine bleach, so it can be used on all sorts of washable fabrics.
Chlorine bleach is much stronger than oxygen bleach, but it is not good for every fabric and has a very harsh smell.
Explanation:
<span>The "treatment" considered the most effective against current day health threats is :
b. prevention.
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